Cycloplegia
Cycloplegia is temporary loss of accommodation caused by paralysis of the ciliary muscle, usually produced deliberately with antimuscarinic eye drops.
Key takeaways
- Cycloplegic refraction reveals the eye’s underlying optical error when active focusing would otherwise distort the measurement.
- Blurred near vision and light sensitivity are expected until the medicine wears off; duration varies by agent.
- Young children and people with certain neurological or eye risks need careful dosing and observation for systemic effects.
The listings below are not for unsupervised use; an eye professional should select the agent and check contraindications.
Why eye specialists induce it
Children can accommodate strongly enough to hide farsightedness or create apparent short-sightedness. Temporarily relaxing focus improves refraction accuracy and dilating the pupil can assist retinal examination. Cycloplegia may also reduce pain and prevent adhesions in selected inflammatory eye conditions.
Expected effects and precautions
Cyclopentolate, tropicamide and atropine differ in strength and duration. Sunglasses and avoiding close work or driving may be needed while vision is affected. Pressing gently at the inner eyelid after a drop can reduce systemic absorption. Flushing, fever, agitation or confusion is not an expected routine effect.
When to seek urgent care
Seek urgent eye or emergency assessment for severe eye pain, persistent vomiting, marked confusion or agitation, breathing difficulty, collapse, or a red eye with halos and rapidly reduced vision.